A digital marketing strategy is not an add on or optional component of a business in 2020. It is a requirement.
Take a look at these statistics from The Pew Research Center from June 2019:
72% of Americans use some form of social media
The age gap for users has closed:
90% of 18-29 y/o use social media
82% of 30-49 y/o use social media
69% of 50-64 y/o use social media
40% of 65+ y/0 use social media
YouTube and Facebook are the most widely used and the users on these two platforms represent the whole population more closely than other platforms.
74% of the population uses Facebook